During an old duffers Skype call the other night we got onto the subject of audible memory. I came to the conclusion that I am definitely not in the A/B camp of yes I hear a difference straight away. For me its only when I remove and replace someone thing in the system that I'm very used to that I am sure of my conclusions. The point incase was briefly replacing my Allnic H-1500 II phono stage with a Whest PS 30R the previous incumbent in my system . First impression was wow clean so I am sort of immediately swayed but then 30 mins later I'm hankering for the Allnic . My point is that if I was not familiar with either phono stage and was asked to A/B I don't think I would back myself to make the right call for me .